libctf/configure.ac

   1 dnl                                            -*- Autoconf -*-
   2 dnl Process this file with autoconf to produce a configure script.
   3 dnl
   4 dnl   Copyright (C) 2019 Free Software Foundation, Inc.
   5 dnl
   6 dnl This file is free software; you can redistribute it and/or modify
   7 dnl it under the terms of the GNU General Public License as published by
   8 dnl the Free Software Foundation; either version 2 of the License, or
   9 dnl (at your option) any later version.
  10 dnl
  11 dnl This program is distributed in the hope that it will be useful,
  12 dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 dnl GNU General Public License for more details.
  15 dnl
  16 dnl You should have received a copy of the GNU General Public License
  17 dnl along with this program; see the file COPYING.  If not see
  18 dnl <http://www.gnu.org/licenses/>.
  19 dnl
  20
  21 AC_PREREQ(2.64)
  22 AC_INIT([libctf library], 1.2.0-pre)
  23 AC_CONFIG_SRCDIR(ctf-impl.h)
  24 AC_CONFIG_MACRO_DIR(../config)
  25 AC_USE_SYSTEM_EXTENSIONS
  26 AM_INIT_AUTOMAKE
  27
  28 # Checks for programs.
  29 AC_PROG_MAKE_SET
  30 AC_PROG_CC
  31 AC_PROG_RANLIB
  32 AM_PROG_AR
  33
  34 AC_SYS_LARGEFILE
  35
  36 MISSING=`cd $ac_aux_dir && ${PWDCMD-pwd}`/missing
  37 AC_CHECK_PROGS([ACLOCAL], [aclocal], [$MISSING aclocal])
  38 AC_CHECK_PROGS([AUTOCONF], [autoconf], [$MISSING autoconf])
  39 AC_CHECK_PROGS([AUTOHEADER], [autoheader], [$MISSING autoheader])
  40
  41 # Figure out what compiler warnings we can enable.
  42 # See config/warnings.m4 for details.
  43
  44 ACX_PROG_CC_WARNING_OPTS([-W -Wall -Wno-narrowing -Wwrite-strings \
  45                           -Wmissing-format-attribute], [warn])
  46 ACX_PROG_CC_WARNING_OPTS([-Wstrict-prototypes -Wmissing-prototypes \
  47                           -Wold-style-definition], [c_warn])
  48 ACX_PROG_CC_WARNING_ALMOST_PEDANTIC([-Wno-long-long])
  49
  50 # Only enable with --enable-werror-always until existing warnings are
  51 # corrected.
  52 ACX_PROG_CC_WARNINGS_ARE_ERRORS([manual])
  53
  54 AM_MAINTAINER_MODE
  55 ACX_PROG_CC_WARNING_OPTS([-Wall], [ac_libctf_warn_cflags])
  56
  57 AC_FUNC_MMAP
  58 AC_SEARCH_LIBS(dlopen, dl)
  59 AM_ZLIB
  60
  61 # Similar to GDB_AC_CHECK_BFD.
  62 OLD_CFLAGS=$CFLAGS
  63 OLD_LDFLAGS=$LDFLAGS
  64 OLD_LIBS=$LIBS
  65 # Put the old CFLAGS/LDFLAGS last, in case the user's (C|LD)FLAGS
  66 # points somewhere with bfd, with -I/foo/lib and -L/foo/lib.  We
  67 # always want our bfd.
  68 CFLAGS="-I${srcdir}/../include -I../bfd -I${srcdir}/../bfd $CFLAGS"
  69 ZLIBDIR=`echo $zlibdir | sed 's,\$(top_builddir)/,,g'`
  70 LDFLAGS="-L../bfd -L../libiberty $ZLIBDIR $LDFLAGS"
  71 intl=`echo $LIBINTL | sed 's,${top_builddir}/,,g'`
  72 LIBS="-lbfd -liberty -lz $intl $LIBS"
  73 AC_CACHE_CHECK([for ELF support in BFD], ac_cv_libctf_bfd_elf,
  74 [AC_TRY_LINK([#include <stdlib.h>
  75              #include "bfd.h"
  76              #include "elf-bfd.h"],
  77             [(void) bfd_section_from_elf_index (NULL, 0);
  78              return 0;],
  79             [ac_cv_libctf_bfd_elf=yes],
  80             [ac_cv_libctf_bfd_elf=no])])
  81 CFLAGS=$OLD_CFLAGS
  82 LDFLAGS=$OLD_LDFLAGS
  83 LIBS=$OLD_LIBS
  84
  85 if test $ac_cv_libctf_bfd_elf = yes; then
  86   AC_DEFINE([HAVE_BFD_ELF], 1,
  87             [Whether libbfd was configured for an ELF target.])
  88 fi
  89
  90 AC_C_BIGENDIAN
  91 AC_CHECK_HEADERS(byteswap.h endian.h)
  92 AC_CHECK_FUNCS(pread)
  93
  94 dnl Check for qsort_r.  (Taken from gnulib.)
  95 AC_CHECK_FUNCS_ONCE([qsort_r])
  96 if test $ac_cv_func_qsort_r = yes; then
  97   AC_CACHE_CHECK([for qsort_r signature], [ac_cv_libctf_qsort_r_signature],
  98     [AC_LINK_IFELSE(
  99        [AC_LANG_PROGRAM([[#undef qsort_r
 100                           #include <stdlib.h>
 101                           void qsort_r (void *, size_t, size_t,
 102                                         int (*) (void const *, void const *,
 103                                                  void *),
 104                                         void *);
 105                           void (*p) (void *, size_t, size_t,
 106                                      int (*) (void const *, void const *,
 107                                               void *),
 108                                      void *) = qsort_r;
 109                         ]])],
 110        [ac_cv_libctf_qsort_r_signature=GNU],
 111        [AC_LINK_IFELSE(
 112           [AC_LANG_PROGRAM([[#undef qsort_r
 113                              #include <stdlib.h>
 114                              void qsort_r (void *, size_t, size_t, void *,
 115                                            int (*) (void *,
 116                                                     void const *,
 117                                                     void const *));
 118                              void (*p) (void *, size_t, size_t, void *,
 119                                         int (*) (void *, void const *,
 120                                                  void const *)) = qsort_r;
 121                            ]])],
 122           [ac_cv_libctf_qsort_r_signature=BSD],
 123           [ac_cv_libctf_qsort_r_signature=unknown])])])
 124 fi
 125
 126 case x$ac_cv_libctf_qsort_r_signature in
 127   xGNU)     AC_DEFINE([HAVE_QSORT_R_ARG_LAST], 1,
 128              [Whether a qsort_r exists with a void *arg as its last arg.]);;
 129   xBSD)     AC_DEFINE([HAVE_QSORT_R_COMPAR_LAST], 1,
 130              [Whether a qsort_r exists with the compar function as its last arg.]);;
 131   *) ac_cv_libctf_qsort_r_signature=unknown;;
 132 esac
 133
 134 AM_CONDITIONAL(NEED_CTF_QSORT_R, test "${ac_cv_libctf_qsort_r_signature}" = unknown)
 135
 136 AC_CACHE_CHECK([for O_CLOEXEC], [ac_cv_libctf_macro_O_CLOEXEC],
 137   [AC_LINK_IFELSE(
 138     [AC_LANG_PROGRAM([[#include <fcntl.h>
 139                        #ifndef O_CLOEXEC
 140                          choke me;
 141                        #endif
 142                      ]],
 143                      [[return O_CLOEXEC;]])],
 144     [ac_cv_libctf_macro_O_CLOEXEC=yes],
 145     [ac_cv_libctf_macro_O_CLOEXEC=no])])
 146
 147 if test $ac_cv_libctf_macro_O_CLOEXEC = yes; then
 148   AC_DEFINE([HAVE_O_CLOEXEC], 1,
 149             [Whether the platform has a definition of O_CLOEXEC.])
 150 fi
 151
 152 AC_CONFIG_FILES(Makefile)
 153 AC_CONFIG_HEADERS(config.h)
 154 AC_OUTPUT